222540646 has 16 divisors (see below), whose sum is σ = 339462864. Its totient is φ = 109396224.

The previous prime is 222540631. The next prime is 222540677. The reversal of 222540646 is 646045222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46941 + ... + 51463.

It is an arithmetic number, because the mean of its divisors is an integer number (21216429).

Almost surely, 2^222540646 is an apocalyptic number.

222540646 is a deficient number, since it is larger than the sum of its proper divisors (116922218).

222540646 is a wasteful number, since it uses less digits than its factorization.

222540646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4935.

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 222540646 is about 14917.7962849745. The cubic root of 222540646 is about 605.9960334058.

Adding to 222540646 its reverse (646045222), we get a palindrome (868585868).

The spelling of 222540646 in words is "two hundred twenty-two million, five hundred forty thousand, six hundred forty-six".